Tramadol-13C,d3 HCl, 100µg/ml in MeOH, 1ml

N-Nitrosopiperazine-d8, 100µg/mL, Solvent-acetonitrile, Unit 1mL, # of units-1, Cas.no. 1330180-56-7

Pentabromo[13C6]phenol, 1.2ml x 100ug/ml, toluene

Asulam-d3 (methoxy-d3),100 µg/mL,acetonitrile,1mL,